A pitcher should not be expected to have to be near perfect the great majority of his starts. Some run support would be nice. This isn't a closer whose job is almost completely to protect 1-2 run leads in an inning's work.

Baseball is a team game - wins are dependent upon how the entire team plays. I refuse to tag a starter who coughs up a 1-run lead in a 1-0 game in late innings with full responsibility, even if "he knew the situation he was in."

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Ridiculousness across all sports:

(1) "You have no valid opinion because you never played the game."
(2) "Stats are irrelevant. This guy just doesn't know how to win."